Anch'io mi baso sui dati.....oltretutto sui dati forniti dal Virus Bulletin da te citato,da cui si evince che gli stessi autori METTONO IN GUARDIA gli utenti dal dare troppo valore al loro test!!!!!!
Inoltre avvertono di LEGGERE le scritte piccine piccine di accompagnamento a queste kermesse:

If you read the small print on the VirusBulletin site

http://www.virusbtn.com/vb100/about/100procedure.xml

it explains why some anti virus applications fail the test, and it clearly says :

There remains ample opportunity for products to miss detection, in our tests, of files which they are perfectly able to detect - why? Of the many potential answers, two are most likely. First, there are the matters of default extension lists, a common area for failure over the years, in which products have failed to gain VB 100% awards because the default extension lists did not include possible extensions for In the Wild viruses. In most cases these extension-based problems are easily solved by an administrator adding extensions to the default list. We could perform these changes prior to testing. We feel, however, that our readers are better served if they know that they have to do this, than if we scan all files regardless of extension.

Another example of why some products miss out on VB 100% awards, is where certain files are not scanned directly on-access. The usual assumption by the product developers is that the files will be scanned when passed on to an application which makes use of them. At the most common level this covers such objects as ZIP files, which are often not scanned until unzipped and EML files, which are not scanned until individual mails are pulled from within. From a developer's point of view these choices make sense in that leaving objects unscanned until use creates fewer overheads. The chance of infection on a protected machine is not increased, since scanning will occur before code execution. Such treatment of objects does, however lead to misses under the VB 100% testing methodology.

A VB 100% award means that a product has passed our tests, no more and no less. The failure to attain a VB 100% award is not a declaration that a product cannot provide adequate protection in the real world if administered by a professional. We would urge any potential customer, when looking at the VB 100% record of any software, not simply to consider passes and fails, but to read the small print in the reviews .

This does not mean that the AV does not work in the real world, just that it does not fit a very tightly controlled laboratory environment

Spiacente per gli amanti dell'imbeccata griffata,ma questi test sono solo un giochino per passare un po' di tempo in allegria.